Hi,
If you have registered on the TPS site you should have got a letter to confirm the details. If you didnt then something went wrong with the registration process.
If you are registered and you get a call from a telesales person just say "If I could just mention that this number is registered on the TPS register and that you are breaking the law by calling this number. Please remove my details fom your database or I will have to report your company if you call again!! If they do call back, take the companys name, telephone number,and time of call and put the info into the TPS website complaints section.
Eventually the sales calls will stop.
Chris